cocos creator 2.1.2 vconsole.min.js:11 Can not animate clone property, because it do not have [lerp, (add|mul), clone] function

当我使用补间并且出现错误时

我用 Typescript

我的代码:
let Pos = new cc.Vec3(x, 0, z);
var tween = new cc.Tween().to(0.02, Pos, null)
.call(() => {
this.NextPos();
});
tween.target(this.ImposterBlue).start();